Whenever you play a Spirit or Arcane spell, you may put a ki counter on Callow Jushi.
At end of turn, if there are two or more ki counters on Callow Jushi, you may flip it.
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Jaraku the Interloper
Legendary Creature - Spirit
3/4
Remove a ki counter from Jaraku the Interloper: Counter target spell unless its controller pays .

Enchant creature
At the end of your turn, clash with an opponent. If you win, gain control of enchanted creature. Otherwise, that player gains control of enchanted creature. (Each clashing player reveals the top card of his or her library, then puts that card on the top or bottom. A player wins if his or her card had a higher converted mana cost.)

Instant and sorcery spells you control have rebound. (Exile the spell as it resolves if you cast it from your hand. At the beginning of your next upkeep, you may cast that card from exile without paying its mana cost.)